Musannaf Ibn Abi Shaybah 40264 — Reports on the tribulation

It is narrated from Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) that he said: The Messenger of Allah (peace and blessings be upon him) said: "The flourishing of Bayt al-Maqdis is the ruin of Yathrib, the ruin of Yathrib is the appearance of the great battle (which will be against the Romans), the appearance of the great battle is the conquest of Constantinople, and the conquest of Constantinople is the emergence of the Dajjal." Then he (peace and blessings be upon him) struck his hand on that man's thigh, or he said on his shoulders, and then said: "This is the truth, just as you are here," or he said: "just as you are sitting." The one meant was Sayyiduna Mu'adh (may Allah be pleased with him) himself.